CN120520778A

CN120520778A - Compressor startup control method, device, temperature control equipment and storage medium

Info

Publication number: CN120520778A
Application number: CN202511018791.5A
Authority: CN
Inventors: 颜喜林; 姚晨; 庞维容
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2025-07-23
Filing date: 2025-07-23
Publication date: 2025-08-22
Anticipated expiration: 2045-07-23
Also published as: CN120520778B

Abstract

The embodiments of the present application relate to a compressor startup control method, apparatus, temperature control device and storage medium, the method comprising: in response to triggering the operation of adding a compressor, obtaining the suction pressure and exhaust pressure of the parallel compressor group; if the pressure difference is greater than or equal to a first preset pressure difference threshold, based on the operating state of at least one preset component in the temperature control device, determining a target component from at least one preset component; adjusting the operating state of the target component to reach a preset state; in response to the current pressure difference being less than the first preset pressure difference threshold and greater than the second preset pressure difference threshold, controlling the startup of the added compressor after a delay of a first preset time. The embodiments of the present application can ensure that the added compressor can be started smoothly under a suitable pressure difference environment on the basis of minimizing the impact on the overall operation of the unit, thereby ensuring the stable operation of the parallel compressor group and reducing the risk of equipment failure caused by compressor startup failure.

Description

Compressor start control method and device, temperature control equipment and storage medium

Technical Field

The present application relates to the field of temperature control technologies, and in particular, to a method and apparatus for controlling startup of a compressor, a temperature control device, and a storage medium.

Background

The screw parallel compressor unit is widely applied to the field of freezing and refrigerating, achieves high energy efficiency ratio and stably provides a cold source for a refrigerating space by adopting a mode that a plurality of screw compressors are connected in parallel and share an air suction pipeline and an air discharge pipeline. In the existing screw parallel machine set system, when the number of compressors needs to be increased to meet higher refrigeration demands, the problem of difficult starting of the compressors is generally encountered. This is mainly because the pressure inside the system is unbalanced, resulting in that the newly added compressor cannot be started under an ideal pressure differential environment, thereby affecting the stable operation of the entire system.

Disclosure of Invention

In view of the above, in order to solve some or all of the above technical problems, embodiments of the present application provide a method, an apparatus, a temperature control device, and a storage medium for controlling the start of a compressor.

In a first aspect, an embodiment of the present application provides a method for controlling start-up of a compressor, including obtaining suction pressure and discharge pressure of a parallel compressor unit in response to triggering an operation of turning on the compressor to the parallel compressor unit in a temperature control device, determining a target component to be currently adjusted from at least one preset component based on an operation state of the at least one preset component in the temperature control device if a pressure difference between the discharge pressure and the suction pressure is greater than or equal to a first preset pressure difference threshold, adjusting the operation state of the target component according to a preset adjustment rule to enable the operation state of the target component to reach the preset state, and controlling start-up of the turned-on compressor in response to the current pressure difference being less than the first preset pressure difference threshold and greater than a second preset pressure difference threshold in a process of adjusting the operation state of the target component, after delaying the first preset time.

In one possible implementation manner, the target component to be adjusted currently is determined from at least one preset component based on the operation state of the at least one preset component in the temperature control device, wherein the determining of whether the opening of the cooling water flow valve in the at least one preset component reaches a first preset opening or not comprises determining that the cooling water flow valve is the target component if the opening of the cooling water flow valve in the at least one preset component does not reach the first preset opening.

In one possible implementation, the operation state of the target component is adjusted according to a preset adjustment rule to enable the operation state of the target component to reach a preset state, and the method comprises the steps of adjusting the opening of the cooling water flow valve to a first preset opening according to a preset first opening adjustment rate, and waiting for a second preset duration.

In one possible implementation manner, the target component to be adjusted currently is determined from at least one preset component based on the operation state of the at least one preset component in the temperature control device, wherein the determining of whether the opening of the electronic expansion valve in the at least one preset component reaches a second preset opening or not comprises determining that the electronic expansion valve is the target component if the second preset opening is not reached.

In one possible implementation, the operation state of the target component is adjusted according to a preset adjustment rule to enable the operation state of the target component to reach a preset state, and the method comprises the step of adjusting the opening of the electronic expansion valve to a second preset opening according to a preset second opening adjustment rate.

In one possible implementation, the determining the current target component to be adjusted from the at least one preset component based on the operation state of the at least one preset component in the temperature control device comprises determining whether the current compressor load of the parallel compressor unit is greater than a preset load threshold value, and if so, determining the compressor load adjustment component in the at least one preset component as the target component.

In one possible embodiment, the operation state of the target component is adjusted according to a preset adjustment rule to enable the operation state of the target component to reach a preset state, and the method comprises the steps of adjusting the operation state of the compressor load adjustment component according to a preset load adjustment rate to enable the compressor load of the compressor unit to be reduced to a preset load threshold.

In one possible embodiment, the compressor load adjustment component comprises a compressor drive circuit and/or a compressor unloader valve, and adjusting the operating state of the compressor load adjustment component according to a preset load adjustment rate comprises reducing the drive frequency of the compressor drive circuit to a preset frequency according to a preset frequency adjustment rate, and/or adjusting the opening of the compressor unloader valve to a third preset opening according to a preset third opening adjustment rate.

In a second aspect, an embodiment of the present application provides a compressor start control apparatus, including an acquisition module configured to acquire an intake pressure and an exhaust pressure of a parallel compressor unit in a temperature control device in response to triggering an operation of starting the compressor to the parallel compressor unit, a first determination module configured to determine a current target component to be adjusted from at least one preset component in the temperature control device based on an operation state of the at least one preset component if a pressure difference between the exhaust pressure and the intake pressure is greater than or equal to a first preset pressure difference threshold, an adjustment module configured to adjust the operation state of the target component according to a preset adjustment rule so that the operation state of the target component reaches the preset state, and a control module configured to control starting of the started compressor in response to a current pressure difference being less than a first preset pressure difference threshold and greater than a second preset pressure difference threshold in a process of adjusting the operation state of the target component, after a delay of a first preset duration.

In a third aspect, an embodiment of the present application provides a temperature control device, including a controller, a parallel compressor unit, an air suction pressure sensor and an exhaust pressure sensor, where the air suction pressure sensor is disposed at an air inlet end of the parallel compressor unit, and the exhaust pressure sensor is disposed at an exhaust end of the parallel compressor unit, where the air suction pressure sensor and the exhaust pressure sensor are both electrically connected to the controller, and the controller is configured to store a computer program and execute the computer program, and when the computer program is executed, implement a method according to any embodiment of the compressor start control method of the first aspect, based on air suction pressure and exhaust pressure collected by the air suction pressure sensor and the exhaust pressure sensor.

In a fourth aspect, an embodiment of the present application provides an electronic device, including a memory for storing a computer program, and a processor for executing the computer program stored in the memory, where the computer program is executed to implement a method according to any one of the embodiments of the compressor start control method according to the first aspect of the present application.

In a fifth aspect, an embodiment of the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as in any of the embodiments of the compressor start control method of the first aspect described above.

In a sixth aspect, embodiments of the present application provide a computer program comprising computer readable code which, when run on a device, causes a processor in the device to implement a method as in any of the embodiments of the compressor start control method of the first aspect described above.

According to the compressor starting control method, the device, the temperature control equipment and the storage medium, when the compressors are added to the parallel compressor unit, the suction pressure and the discharge pressure are obtained, the pressure difference is calculated, if the pressure difference is larger than or equal to the first preset pressure difference threshold value, the current target part to be adjusted is determined based on the running state of at least one preset part in the temperature control equipment, the running state of the target part is adjusted according to the preset adjustment rule, and in the process of adjusting the running state of the target part, the starting of the added compressors is controlled after the first preset time is delayed in response to the fact that the current pressure difference is smaller than the first preset pressure difference threshold value and larger than the second preset pressure difference threshold value. According to the embodiment of the application, the purpose of adjusting and selecting the target component and adjusting the running state of the target component according to the suction and exhaust pressure difference monitored in real time is realized, and the additional compressor is restarted when the condition that the additional compressor can be started is reached, so that on the basis of reducing the influence on the whole running of the unit as much as possible, the additional compressor can be ensured to be smoothly started under a proper pressure difference environment, the stable running of the parallel compressor unit is ensured, and the equipment fault risk caused by the failure of the starting of the compressor is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic flow chart of a compressor start control method according to an embodiment of the present application;

FIG. 2 is a flow chart of another method for controlling the start of a compressor according to an embodiment of the present application;

Fig. 3 is an exemplary internal structural diagram of a temperature control apparatus provided in an embodiment of the present application;

FIG. 4 is a flow chart of a further method for controlling the start of a compressor according to an embodiment of the present application;

FIG. 5 is a flow chart of a further compressor start control method according to an embodiment of the present application;

FIG. 6 is a flow chart of a further compressor start control method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a compressor start control device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a temperature control device according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments of the application will now be described in detail with reference to the accompanying drawings, it being apparent that the described embodiments are some, but not all embodiments of the application. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

It will be appreciated by those skilled in the art that terms such as "first," "second," and the like in the embodiments of the present application are used merely to distinguish between different steps, devices or modules and the like, and do not represent any particular technical meaning or logical sequence therebetween.

It should also be understood that in this embodiment, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.

It should also be appreciated that any component, data, or structure referred to in an embodiment of the application may be generally understood as one or more without explicit limitation or the contrary in the context.

In addition, the term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate that a exists alone, and a and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

It should also be understood that the description of the embodiments of the present application emphasizes the differences between the embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, circuits, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. For an understanding of embodiments of the present application, the present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In order to solve the technical problem that the starting of the compressor is difficult when the parallel compressor unit is started, the application provides a compressor starting control method, which can adjust the running state of equipment according to the suction and exhaust pressure difference, so that the pressure difference reaches the condition suitable for starting the compressor when the compressor is started, and the starting control method is beneficial to the starting of the compressor.

Fig. 1 is a flow chart of a compressor start control method according to an embodiment of the present application. The method can be applied to temperature control equipment and can be executed by a controller of the temperature control equipment. Alternatively, the method may be performed by other electronic devices connected to the temperature control device, such as a smart phone, a notebook computer, a desktop computer, a server, etc. The main execution body of the method may be hardware or software. When the execution body is hardware, the execution body may be one or more of the electronic devices. For example, a single electronic device may perform the method, or multiple electronic devices may cooperate with one another to perform the method. When the execution subject is software, the method may be implemented as a plurality of software or software modules, or may be implemented as a single software or software module. The present application is not particularly limited herein.

As shown in fig. 1, the method specifically includes:

And step 101, responding to the operation of triggering the start-up of the compressor to the parallel compressor unit in the temperature control equipment, and acquiring the suction pressure and the discharge pressure of the parallel compressor unit.

In some embodiments, the parallel compressor train may be a screw parallel train comprising a plurality of screw compressors, the compressors operating in parallel. And adding a compressor to the parallel compressor unit, namely connecting a new compressor to the parallel compressor unit in parallel and starting the compressor. The above-described operation of triggering the compressor on may be performed manually (e.g., a user manipulating a switch for switching the compressor on) or automatically (e.g., detecting a new compressor in parallel).

The suction pressure P (L) and the discharge pressure P (H) may be acquired by pressure sensors provided at the intake end and the discharge end of the parallel compressor unit, respectively.

Step 102, if the pressure difference between the exhaust pressure and the suction pressure is greater than or equal to the first preset pressure difference threshold, determining the current target component to be adjusted from at least one preset component based on the operation state of at least one preset component in the temperature control device.

In some embodiments, the pressure difference is Δp=p (H) -P (L). If the pressure difference between the discharge pressure and the suction pressure is greater than or equal to the first preset pressure difference threshold P1 (for example, 600kpa to 1000kpa may be taken), the opened compressor may not be started smoothly due to the excessive pressure difference.

The temperature control device may be a device for compressing a refrigerant material by a compressor and circulating the refrigerant material to adjust the temperature. Such as air conditioning, refrigerators, freezers, etc. The at least one preset part is a preset part capable of influencing the pressure difference. For example, the at least one predetermined component includes, but is not limited to, at least one of a cooling water flow valve, an electronic expansion valve, an unloading solenoid valve of a compressor, and the like.

In this embodiment, the manner of selecting the target component from the at least one preset component may be preset. For example, whether each preset part reaches the corresponding preset state may be sequentially determined according to a preset sequence, if not, the current preset part is determined to be the target part, and the subsequent steps are executed for the target part. For another example, all preset parts that do not reach the preset state may be simultaneously targeted parts for which subsequent steps are performed.

And step 103, adjusting the running state of the target component according to a preset adjustment rule to enable the running state of the target component to reach a preset state.

In some embodiments, the adjustment rules may be set according to actual requirements. For example, the adjustment rate may be set to gradually adjust the state of the target member, or may be set to adjust the target member to a preset state at one time. For example, if the target member is a coolant flow valve, the flow rate increase rate may be set so that the opening of the coolant flow valve gradually increases to 100%.

Step 104, in the process of adjusting the running state of the target component, responding to the fact that the current pressure difference is smaller than a first preset pressure difference threshold value and larger than a second preset pressure difference threshold value, and after delaying the first preset time period, controlling the start of the started compressor.

In some embodiments, the second preset pressure difference threshold P2 is the lowest pressure difference required for normal operation of the parallel compressor unit, for example, the second preset pressure difference threshold may be generally 150 to 250kpa.

When the running state of the target component is adjusted, the electronic equipment executing the method can monitor the current pressure difference delta P in real time, and if P2< [ delta ] P < P1, the pressure difference condition conforming to the start-up compressor is determined. That is, the execution of step 104 may be triggered during the execution of step 103. In order to stabilize the state of the temperature control device when the compressor is turned on, the first preset time period may be delayed, and then the turned-on compressor is started. The first preset duration may be set arbitrarily according to the requirement, for example, 5s, 10s, 0s, etc.

Alternatively, after the normal start of the opened compressor, the operation state of the at least one preset part may be restored to the initial state or adjusted to the set state.

According to the compressor starting control method provided by the embodiment of the application, when the compressors are added to the parallel compressor unit, the suction pressure and the discharge pressure are obtained, the pressure difference is calculated, if the pressure difference is larger than or equal to the first preset pressure difference threshold value, the current target part to be adjusted is determined based on the running state of at least one preset part in the temperature control equipment, the running state of the target part is adjusted according to the preset adjustment rule, and in the process of adjusting the running state of the target part, the starting of the added compressors is controlled after the first preset time is delayed in response to the fact that the current pressure difference is smaller than the first preset pressure difference threshold value and larger than the second preset pressure difference threshold value. According to the embodiment of the application, the purpose of adjusting and selecting the target component and adjusting the running state of the target component according to the suction and exhaust pressure difference monitored in real time is realized, and the additional compressor is restarted when the condition that the additional compressor can be started is reached, so that on the basis of reducing the influence on the whole running of the unit as much as possible, the additional compressor can be ensured to be smoothly started under a proper pressure difference environment, the stable running of the parallel compressor unit is ensured, and the equipment fault risk caused by the failure of the starting of the compressor is reduced.

In some alternative implementations, as shown in fig. 2, step 102 includes:

step 1021, determining whether the opening of the cooling water flow valve in at least one preset component reaches a first preset opening.

As shown in fig. 3, a schematic structural diagram of the temperature control apparatus is shown. Wherein the cooling water flow valve 301 is typically installed on the cooling water outlet pipe of the condenser. The cooling water is used for taking away the heat of the refrigerant, and releases the heat from the external cooling tower, so that the normal operation of the whole unit is ensured.

The first preset opening degree may be set according to the requirement, for example, 100%.

Step 1022, if the first preset opening is not reached, determining the cooling water flow valve as the target component.

If the cooling water flow valve does not reach the first preset opening, the flow of the cooling water is low, and the purpose of reducing the pressure difference can be achieved by increasing the flow of the cooling water.

According to the embodiment, under the condition that the opening degree of the cooling water flow valve does not reach the first preset opening degree, the cooling water flow valve is used as a target component, the opening degree of the cooling water flow valve is further controlled, the mode of adjusting the cooling water flow can be achieved, the pressure of the refrigerant in the condenser is preferentially adjusted to reduce the pressure difference of the refrigerant, namely, the high-temperature high-pressure refrigerant is preferentially adjusted, the pressure of the low-pressure refrigerant in the evaporator at the tail end is kept stable, and therefore the refrigeration stability of the evaporator is guaranteed.

In some alternative implementations, as shown in fig. 2, step 103 includes:

step 1031, adjusting the opening of the cooling water flow valve to a first preset opening according to a preset first opening adjustment rate, and waiting for a second preset duration.

The first opening adjustment rate can be set according to actual requirements. For example, the opening degree may be immediately adjusted to the first preset opening degree, or the opening degree may be gradually adjusted at the rate of x%/s.

The purpose of waiting for the second preset time length is to adapt to the action reaction time of the cooling water flow valve and ensure the stability of the cooling water flow. For example, the second preset time period may be 30s to 60s.

According to the embodiment, the opening of the cooling water flow valve is adjusted, and a period of time is waited after adjustment, so that the influence on terminal refrigeration can be reduced on the basis of reducing the pressure difference of the refrigerant of the compressor, and the running stability of the unit is ensured.

In some alternative implementations, as shown in fig. 4, step 102 includes:

Step 1023, determining whether the opening degree of the electronic expansion valve in at least one preset part reaches a second preset opening degree.

As shown in fig. 3, the electronic expansion valve 302 is disposed between a condenser and an evaporator included in the temperature control apparatus. The electronic expansion valve is used for adjusting the refrigerant flow from the condenser to the evaporator.

The second preset opening degree may be set according to actual requirements, for example, 100%. If the electronic expansion valve does not reach the second preset opening degree, the opening degree can be increased to increase the flow rate of the refrigerant from the condenser to the evaporator, so that the pressure difference of the refrigerant of the compressor unit is reduced.

Step 1024, if the second preset opening is not reached, determining the electronic expansion valve as the target component.

According to the embodiment, whether the electronic expansion valve can be used as a target component for state adjustment is judged by monitoring the opening degree of the electronic expansion valve, more realization modes can be provided for reducing the refrigerant pressure difference, and the refrigerant pressure difference can be controlled more efficiently.

In some alternative implementations, as shown in fig. 4, step 103 includes:

Step 1032, adjusting the opening of the electronic expansion valve to a second preset opening according to the preset second opening adjustment rate.

The second opening adjustment rate can be set according to actual requirements. For example, the opening degree may be immediately adjusted to the second preset opening degree, or the opening degree may be gradually adjusted at the rate of x%/s.

According to the embodiment, the opening degree of the electronic expansion valve is adjusted, so that the efficiency of adjusting the pressure difference of the refrigerant can be further improved, and the running stability of the parallel compressor unit is ensured.

In some alternative implementations, as shown in fig. 5, step 102 includes:

Step 1025, determining whether the current compressor load of the parallel compressor group is greater than a preset load threshold.

The load of the compressor refers to the electric energy consumption required by the parallel compressor unit to compress low-pressure gas to high pressure. Typically, this is obtained by calculating the ratio of the current of the parallel compressor unit to the set rated current.

The preset load amount threshold may be set according to actual requirements, for example 55%.

If yes, a compressor load adjustment component of the at least one predetermined component is determined as the target component.

The compressor load adjusting member is a member that is set in advance and affects the load amount of the compressor. For example, the compressor load adjusting part includes a compressor driving circuit, an unloading valve, and the like. The state of the compressor load adjustment component may be adjusted to thereby indirectly adjust compressor compliance.

According to the embodiment, whether the refrigerant pressure difference is indirectly adjusted by reducing the load of the compressor is judged by monitoring the load of the compressor, more realization modes can be provided for reducing the refrigerant pressure difference, the pressure difference is regulated from the source of refrigerant compression, and the refrigerant pressure difference can be controlled more efficiently.

In some alternative implementations, as shown in fig. 5, step 103 includes:

step 1033, according to the preset load adjustment rate, adjusting the running state of the compressor load adjustment component to reduce the compressor load of the compressor unit to the preset load threshold.

The load adjustment rate can be set according to actual requirements. For example, an adjustment period may be set, and the state of the compressor load adjustment member may be adjusted once for each adjustment period, so that the compressor load amount gradually decreases.

According to the embodiment, the state of the compressor load adjusting component is adjusted, so that the load of the compressor is indirectly adjusted, the efficiency of adjusting the refrigerant pressure difference can be further improved, and the running stability of the parallel compressor unit is ensured.

In some alternative implementations, the compressor load adjustment component includes a compressor drive circuit, and/or a compressor unloader solenoid valve. Wherein the compressor driving circuit drives the compressor according to the set driving frequency. The more gas it compresses per cycle, the greater the pressure difference between discharge pressure and suction pressure at a given operating frequency of the parallel compressor train. By using a compressor unloader solenoid valve, the gas compressed per cycle of the compressor can be reduced, thereby reducing the pressure differential between the discharge pressure and suction pressure.

Step 1033 includes:

And/or adjusting the opening of the unloading electromagnetic valve of the compressor to a third preset opening according to a third preset opening adjustment rate.

The preset frequency may be a lower frequency limit of normal operation of the compressor, and the third preset opening may be set according to actual requirements, for example, 50%.

According to the embodiment, the driving frequency and/or the unloading electromagnetic valve of the compressor are/is adjusted, so that the high-efficiency adjustment of the load quantity of the compressor can be realized, the adjustment quantity can directly influence the pressure difference of the compressor, and the pressure difference can be adjusted to be suitable for the addition of a new compressor more efficiently.

Alternatively, in combination with the above embodiments, as shown in fig. 6, another exemplary flowchart of the present method is shown. First, before a new compressor is ready to be started, the suction pressure P (L) and the discharge pressure P (H) of the parallel compressor unit are detected, and the pressure difference Δp is calculated. And judging whether delta P is larger than or equal to P1 (a first preset pressure difference threshold), if not, directly controlling the start of the opened compressor under the condition that delta P is larger than P2 (a second preset pressure difference threshold), and if so, adjusting the opening of the cooling water flow valve to 100 percent and waiting for t1 time. And then judging whether the delta P is larger than or equal to P1 again, if not, directly controlling the starting of the opened compressor, and if so, gradually increasing the opening of the electronic expansion valve according to the preset adjustment rate, and continuously judging whether the delta P is larger than or equal to P1. If the opening degree of the electronic expansion reaches 100%, delta P is still larger than or equal to P1, and the load of the compressor is gradually reduced to 55% according to the preset adjustment rate. And if the load of the compressor is reduced to 55%, the delta P is still greater than or equal to P1, and the execution of the steps is finished. The state of each component of the temperature control device can be restored to the initial state later, and after the deltap is stabilized (for example, the deltap fluctuation amount is less than 10kPa within two minutes), the method is re-executed, or a warning message is sent to the user.

Fig. 7 is a schematic structural diagram of a compressor start control device according to an embodiment of the present application. The method specifically comprises the following steps:

An obtaining module 701, configured to obtain a suction pressure and a discharge pressure of a parallel compressor unit in response to triggering an operation of adding a compressor to the parallel compressor unit in the temperature control apparatus;

A first determining module 702, configured to determine, from at least one preset component, a target component to be currently adjusted based on an operation state of the at least one preset component in the temperature control device if a pressure difference between the exhaust pressure and the intake pressure is greater than or equal to a first preset pressure difference threshold;

The adjusting module 703 is configured to adjust the operation state of the target component according to a preset adjusting rule, so that the operation state of the target component reaches a preset state;

and the control module 704 is configured to control the start of the turned-on compressor after delaying the first preset time period in response to the current pressure difference being smaller than the first preset pressure difference threshold and larger than the second preset pressure difference threshold in the process of adjusting the operation state of the target component.

In some optional implementations, the first determining module includes a first determining unit configured to determine whether an opening of the cooling water flow valve in the at least one preset component reaches a first preset opening, and a second determining unit configured to determine the cooling water flow valve as the target component if the first preset opening is not reached.

In some alternative implementations, the adjustment module includes a first adjustment unit configured to adjust the opening of the cooling water flow valve to a first preset opening according to a preset first opening adjustment rate, and wait for a second preset duration.

In some optional implementations, the first determining module includes a third determining unit configured to determine whether an opening of the electronic expansion valve in the at least one preset component reaches a second preset opening, and a fourth determining unit configured to determine that the electronic expansion valve is the target component if the second preset opening is not reached.

In some alternative implementations, the adjustment module includes a second adjustment unit configured to adjust the opening of the electronic expansion valve to a second preset opening according to a preset second opening adjustment rate.

In some alternative implementations, the first determining module includes a fifth determining unit configured to determine whether a current compressor load of the parallel compressor unit is greater than a preset load threshold, and a sixth determining unit configured to determine a compressor load adjustment component of the at least one preset component as the target component if the current compressor load of the parallel compressor unit is greater than the preset load threshold.

In some alternative implementations, the adjustment module includes a third adjustment unit configured to adjust an operating state of the compressor load adjustment component according to a preset load adjustment rate to reduce a compressor load of the compressor unit to a preset load threshold.

In some alternative implementations, the compressor load adjustment component includes a compressor drive circuit and/or a compressor unloader valve, the third adjustment unit includes a first adjustment subunit configured to reduce a drive frequency of the compressor drive circuit to a preset frequency at a preset frequency adjustment rate, and/or a second adjustment subunit configured to adjust an opening of the compressor unloader valve to a third preset opening at a preset third opening adjustment rate.

The compressor start control device provided in this embodiment may be a compressor start control device as shown in fig. 7, and may perform all the steps of each of the above compressor start control methods, so as to achieve the technical effects of each of the above compressor start control methods, and specific reference should be made to the above related description, which is omitted herein for brevity.

Fig. 8 is a schematic structural diagram of a temperature control device 800 according to an embodiment of the present application. The temperature control device 800 specifically comprises a controller 801, a parallel compressor unit 802, an air suction pressure sensor 803 and an exhaust pressure sensor 804, wherein the air suction pressure sensor 803 is arranged at an air inlet end of the parallel compressor unit, and the exhaust pressure sensor 804 is arranged at an air exhaust end of the parallel compressor unit.

The suction pressure sensor 803 and the exhaust pressure sensor 804 are electrically connected to the controller 801, and the controller is configured to store a computer program and execute the computer program, and when the computer program is executed, implement the above-described compressor start control method based on the suction pressure and the exhaust pressure acquired by the suction pressure sensor and the exhaust pressure sensor.

It should be understood that the internal structure of the temperature control apparatus shown in fig. 8 shows only a part of the components, and the actual temperature control apparatus further includes a cooling water flow valve, an electronic expansion valve, a condenser, an evaporator, and the like shown in fig. 3.

The temperature control equipment provided by the embodiment of the application realizes that the running state of the system is adjusted according to the suction and exhaust pressure difference monitored in real time, and the additional compressor is restarted when the condition that the additional compressor can be started is reached, so that the additional compressor can be ensured to be smoothly started under a proper pressure difference environment, the stable running of the temperature control equipment is further ensured, and the fault risk of the temperature control equipment caused by the failure of the starting of the compressor is reduced.

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device 900 shown in fig. 9 includes at least one processor 901, a memory 902, at least one network interface 904, and other user interfaces 903. The various components in the electronic device 900 are coupled together by a bus system 905. It is appreciated that the bus system 905 is employed to enable connected communications between these components. The bus system 905 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled as bus system 905 in fig. 9.

The user interface 903 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen, etc.).

It will be appreciated that the memory 902 in embodiments of the application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (Double DATA RATE SDRAM, DDRSDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCH LINK DRAM, SLDRAM), and Direct memory bus random access memory (DRRAM). The memory 902 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some implementations, the memory 902 stores elements, executable units or data structures, or a subset thereof, or an extended set thereof, an operating system 9021 and application programs 9022.

The operating system 9021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 9022 includes various application programs such as a media player (MEDIA PLAYER), a Browser (Browser), and the like for implementing various application services. A program for implementing the method of the embodiment of the present application may be included in the application 9022.

In this embodiment, by calling a program or an instruction stored in the memory 902, specifically, a program or an instruction stored in the application 9022, the processor 901 is configured to execute the method steps provided in the method embodiments, for example, including:

The method comprises the steps of triggering the operation of adding compressors to a parallel compressor unit in temperature control equipment to start the compressors, acquiring the suction pressure and the discharge pressure of the parallel compressor unit, determining a current target part to be adjusted from at least one preset part based on the operation state of the at least one preset part in the temperature control equipment if the pressure difference between the discharge pressure and the suction pressure is larger than or equal to a first preset pressure difference threshold value, adjusting the operation state of the target part according to a preset adjustment rule to enable the operation state of the target part to reach the preset state, and controlling the start of the added compressors after delaying the first preset time period in response to the fact that the current pressure difference is smaller than the first preset pressure difference threshold value and larger than a second preset pressure difference threshold value in the process of adjusting the operation state of the target part.

The method disclosed in the above embodiment of the present application may be applied to the processor 901 or implemented by the processor 901. Processor 901 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 901 or instructions in the form of software. The Processor 901 may be a general purpose Processor, a digital signal Processor (DIGITAL SIGNAL Processor, DSP), an Application SPECIFIC INTEGRATED Circuit (ASIC), an off-the-shelf programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software elements in a decoding processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 902, and the processor 901 reads information in the memory 902 and performs the steps of the above method in combination with its hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application SPECIFIC INTEGRATED Circuits (ASICs), digital signal processors (DIGITAL SIGNAL Processing, DSPs), digital signal Processing devices (DSPDEVICE, DSPD), programmable logic devices (Programmable Logic Device, PLDs), field-Programmable gate arrays (Field-Programmable GATE ARRAY, FPGA), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units for performing the above-described functions of the application, or a combination thereof.

For a software implementation, the techniques described herein may be implemented by means of units that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The electronic device provided in this embodiment may be an electronic device as shown in fig. 9, and may perform all the steps of the above-described method for controlling the start of each compressor, so as to achieve the technical effects of the above-described method for controlling the start of each compressor, and specific reference is made to the above-described related description, which is omitted herein for brevity.

The embodiment of the application also provides a storage medium (computer readable storage medium). The storage medium here stores one or more programs. The storage medium may include volatile memory, such as random access memory, or nonvolatile memory, such as read only memory, flash memory, hard disk, or solid state disk, or a combination of the foregoing.

When one or more programs in the storage medium are executable by one or more processors, the above-described compressor start control method executed on the electronic device side is implemented.

The above processor is configured to execute a program stored in the memory to implement the following steps of a compressor start control method executed on the electronic device side:

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different circuitry for each particular application, but such implementation is not to be considered as beyond the scope of the present application.

The steps of a circuit or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A compressor start control method, the method comprising:

Responding to triggering the operation of adding a compressor to a parallel compressor unit in temperature control equipment, and acquiring the suction pressure and the discharge pressure of the parallel compressor unit;

If the pressure difference between the exhaust pressure and the suction pressure is greater than or equal to a first preset pressure difference threshold, determining a target component to be adjusted currently from at least one preset component in the temperature control device based on the operation state of the at least one preset component;

according to a preset regulation rule, regulating the running state of the target component to enable the running state of the target component to reach a preset state;

and in the process of adjusting the running state of the target component, controlling the start of the started compressor after delaying the first preset time period in response to the fact that the current pressure difference is smaller than the first preset pressure difference threshold and larger than the second preset pressure difference threshold.

2. The method of claim 1, wherein the determining a current target component to be adjusted from at least one preset component in the temperature control device based on an operational state of the at least one preset component comprises:

Determining whether the opening degree of the cooling water flow valve in the at least one preset part reaches a first preset opening degree;

and if the first preset opening degree is not reached, determining the cooling water flow valve as the target component.

3. The method according to claim 2, wherein adjusting the operation state of the target component according to the preset adjustment rule to make the operation state of the target component reach the preset state comprises:

And adjusting the opening of the cooling water flow valve to the first preset opening according to a preset first opening adjusting rate, and waiting for a second preset duration.

4. The method of claim 1, wherein the determining a current target component to be adjusted from at least one preset component in the temperature control device based on an operational state of the at least one preset component comprises:

Determining whether the opening degree of the electronic expansion valve in the at least one preset part reaches a second preset opening degree;

and if the second preset opening degree is not reached, determining the electronic expansion valve as the target component.

5. The method of claim 4, wherein adjusting the operating state of the target component according to the preset adjustment rule to reach the preset state comprises:

And adjusting the opening of the electronic expansion valve to a second preset opening according to a preset second opening adjusting rate.

6. The method of claim 1, wherein the determining a current target component to be adjusted from at least one preset component in the temperature control device based on an operational state of the at least one preset component comprises:

determining whether the current compressor load of the parallel compressor unit is greater than a preset load threshold;

and if the load quantity is larger than the preset load quantity threshold value, determining a compressor load adjusting part in the at least one preset part as the target part.

7. The method of claim 6, wherein adjusting the operational state of the target component according to the preset adjustment rule to reach the preset state includes:

and adjusting the running state of the compressor load adjusting component according to a preset load adjusting rate to reduce the load of the compressor unit to the preset load threshold.

8. The method of claim 7, wherein the compressor load adjustment component comprises a compressor drive circuit, and/or a compressor unloader solenoid valve;

the adjusting the running state of the compressor load adjusting component according to the preset load adjusting rate comprises the following steps:

Reducing the driving frequency of the compressor driving circuit to a preset frequency according to a preset frequency adjustment rate, and/or,

And adjusting the opening of the compressor unloading electromagnetic valve to a third preset opening according to a preset third opening adjusting rate.

9. A compressor start control device, the device comprising:

The acquisition module is used for responding to the operation of triggering the start-up of the compressor to the parallel compressor unit in the temperature control equipment and acquiring the suction pressure and the discharge pressure of the parallel compressor unit;

A first determining module, configured to determine, from at least one preset component in the temperature control device, a target component to be currently adjusted, based on an operation state of the at least one preset component if a pressure difference between the exhaust pressure and the intake pressure is greater than or equal to a first preset pressure difference threshold;

the adjusting module is used for adjusting the running state of the target component according to a preset adjusting rule so that the running state of the target component reaches a preset state;

And the control module is used for responding to the fact that the current pressure difference is smaller than the first preset pressure difference threshold value and larger than the second preset pressure difference threshold value in the process of adjusting the running state of the target component, and controlling the start of the started compressor after delaying the first preset time length.

10. The temperature control equipment is characterized by comprising a controller, a parallel compressor unit, an air suction pressure sensor and an exhaust pressure sensor, wherein the air suction pressure sensor is arranged at an air inlet end of the parallel compressor unit, and the exhaust pressure sensor is arranged at an exhaust end of the parallel compressor unit;

The suction pressure sensor and the exhaust pressure sensor are both electrically connected with the controller, the controller is used for storing a computer program and executing the computer program, and when the computer program is executed, the compressor starting control method according to any one of claims 1-8 is realized based on the suction pressure and the exhaust pressure acquired by the suction pressure sensor and the exhaust pressure sensor.

11. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the compressor start control method according to any one of the preceding claims 1-8.